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  • Class design for calling "the same method" on different classes from one place

    - by betatester07
    Let me introduce my situation: I have Java EE application and in one package, I want to have classes which will act primarily as cache for some data from database, for example: class that will hold all articles for our website class that will hold all categories etc. Every class should have some update() method, which will update data for that class from database and also some other methods for data manipulation specific for that data type. Now, I would like to call update() method for all class instances (there will be exactly one class instance for every class) from one place. What is the best design?

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  • Are C or C++ The Only Viable Languages for a GC

    - by user95312
    Background I have just finished writing a compiler for a functional language compiling to the JVM as a learning project. However, since I'm just doing this to learn, I thought it might be interesting to write a native backend and a RTS for it. As I've been planning out what this new backend will look like, the one point I'm stumbling on is the garbage collector. I've implemented the compiler in Haskell. But I have no desire to write the GC in Haskell since, while it may be possible, it'd suck. Question I've looked at several FOSS garbage collectors prior to posting and most of them were implemented in good old ANSI C. Is this still the most accepted choice for writing a GC nowadays? I've seen that this site tends to frown upon questions with multiple answers so I hope this will make it more specific: If some startup was writing a professional grade gc today, are the only viable choice for them C or C++? It's my first question here so please comment and let me know if this question is ill-suited for for programmers.

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  • MS TechDays &ndash; My WP7 Talk&rsquo;s Links and Notes

    - by D'Arcy Lussier
    I hope those that attended my Windows Phone 7 talk this morning at Winnipeg TechDays enjoyed it! As promised, below are relevant links and info from my session. Differences Between Silverlight on Windows and Windows Phone http://msdn.microsoft.com/en-us/library/ff426930(VS.96).aspx#Controls Isolated Storage Best Practices for Windows Phone http://msdn.microsoft.com/en-us/library/ff769544(v=VS.92).aspx Class Library Support for Windows Phone http://msdn.microsoft.com/en-us/library/dd470087(v=VS.96).aspx AppHub and Windows Phone 7 Development Tools http://create.msdn.com Windows Phone 7 Application Certification Requirements (PDF Document) http://go.microsoft.com/fwlink/?LinkID=183220 My Blog Post on WP7 and Micro SD Cards – What You Need To Know http://geekswithblogs.net/dlussier/archive/2010/11/10/142667.aspx If there’s anything else from my presentation that you’d like to know, please comment and let me know!

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  • Per fragment lighting with OpenGL 4.x tessellated model

    - by Finlaybob
    I'm experienced with OpenGL 3+. I'm dabbling with tessellation shaders and have now got to a point where I have a nicely tessellated teapot/plane demo (quick look here) As can be seen from the screenshots, the lighting is broken (though admittedly doesn't look too bad in the image) I've tried to add a normal map to the equation but it still doesn't come out right, I can calculate the normals, tangents and binormals per triangle in the geometry shader but still looks wrong. I think the question would be; How do I add per fragment lighting to a tessellated model? The teapot is 32 16-point patches, the plane is one single 16 point patch. The shaders are here, but they are a complete mess, so I don't blame anyone who cant make sense of them. But peruse at your leisure if you like. Also, if this question is more suited to be somewhere else i.e. Stack Overflow or the Programming stack please let me know.

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  • Analysing traffic sources in Analytics for Magento sales

    - by Joe
    Hi I have a Magento installation linked with a Google Analytics account. It works very well in that I can see conversions, I can see the products that are selling directly from analytics and I can get an overview of traffic sources for those sales. What I can't work out how to track/see is what keywords are being used by the customers that are completing sales. Can anybody let me know how this data can be gathered or if it's even possible? (is this possibly a privacy issue?)

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  • Can I (reasonably) refuse to sign an NDA for pro bono work? [closed]

    - by kojiro
    A friend of mine (let's call him Joe) is working on a promising project, and has asked me for help. As a matter of friendship I agreed (orally) not to discuss the details, but now he has a potential investor who wants me to sign a non-disclosure agreement (NDA). Since thus far all my work has been pro bono I told Joe I am not comfortable putting myself under documented legal obligation without some kind of compensation for the risk. (It needn't be strictly financial. I would accept a small ownership stake or possibly even just guaranteed credits in the code and documentation.) Is my request reasonable, or am I just introducing unnecessary complexity?

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  • Can data classes contain methods for validation?

    - by Arturas M
    OK, say I have a data class for a user: public class User { private String firstName; private String lastName; private long personCode; private Date birthDate; private Gender gender; private String email; private String password; Now let's say I want to validate email, whether names are not empty, whether birth date is in normal range, etc. Can I put that validation method in this class together with data? Or should it be in UserManager which in my case handles the lists of these users?

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  • Prevent azure subdomain indexation

    - by Leg10n
    Let me explain my situation, I have an azure website (with azurewebsites.net sub domain), and a custom domain.com, built with asp.net MVC Both are being indexed by Google, but I've noticed the custom domain is being penalized and it doesn't show up in results, it only shows when I search for "site:domain.com" I want to remove and block the azurewebsites.net subdomain from Google. I've read the "possible" solutions: Adding robots.txt: won't work, because the subdomain and the domain are the exact same content, so subdomain.azures.net/robots.txt will lead to domain.com/robots.txt, removing the domain as well. Adding the tag, is the same situation as the previous point. I'm using a CNAME register to redirect the domain to the subdomain, so I can't redirect to a sub directory. Do you have any other ideas?

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  • Easy Server-Side Language

    - by Nizar
    Most of programming languages (Server-side languages for web development) needs a learning curve and requires some time to learn. However, I'm sure there is a difference between them. So, for example you can master the 'X' language in less time than the 'Y' language. I'm a beginner in web development, meaning that I just know HTML and CSS and now want to choose the right tool for building dynamic sites. What I'm looking for is a language that is easy to master in less time than other languages. So, is there a language that can suit my needs? If so, please let me know about what should I learn in it? (for example, which frameworks?, libraries?, IDEs?, databases?, etc). In the end, I don't want to regret my choice of the language and want to learn solid basics in it and in programming in general.

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  • How to synchronise the acceleration, velocity and position of the monsters on the server with the players?

    - by Nick
    I'm building an MMO using Node.js, and there are monsters roaming around. I can make them move around on the server using vector variables acceleration, velocity and position. acceleration = steeringForce / mass; velocity += acceleration * dTime; position += velocity * dTime; Right now I just send the positions over, and tell the players these are the "target positions" of the monsters, and let the monsters move towards the target positions on the client with a speed dependant on the distance of the target position. It works but looks rather strange. How do I synchronise these properly with the players without looking funny to them, taking into account the server lag? The problem is that I don't know how to make use of the correct acceleration/velocity values here; right now they just move directly in a straight line to the target position instead of accelerating/braking there properly. How can I implement such behaviour?

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  • Make a live USB of your installed ubuntu

    - by Eray Tuncer
    Okay let me clear my point. Lets assume I want to make a internet cafe-like system. Every user will be able to enter via only one user account to linux. However, I do not want them to leave anything behind. Whenever this ubuntu is booted, I want to this system remove their garbage. Why I mentioned the live USB is that I have seen that live usb or cd makes what I want but not exactly because I want to install some apps on it and make some confugration like firewall, permissions.

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  • Major problem with Nvidia drivers

    - by user38580
    Since I decided to use Ubuntu -yesterday- I've been struggling with the drivers. It isn't recognizing my optical disc drive nor my video card, a Nvidia 8500gt. For the matter, here's how I "successfully" installed the .run driver downloaded from Nvidia's website: The terminal wouldn't let me start the installation because the X server had to be shutdown, so I pressed Ctrl+Alt+F1 Then, I used: sudo service lightdm stop cd /(directory where the nvidiaupdate.run was) chmod +x nvidiaupdate.run sudo ./nvidiaupdate.run The installation began and got completed, but unfortunately it crashed Ubuntu's UI, invalidating the OS for me. All that would appear was a DOS-like screen with reports. I'm new to Linux, so I really would appreciate any help given. For now, I'm sticking to the additional drivers, but even with it Ubuntu doesn't show my video card in the informations of the system. Forgive my bad English.

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  • MEA Oracle University Partner Enablement Update (22nd March)

    - by swalker
    Become an Oracle GoldenGate 10 Certified Implementation Specialist Let Oracle University help you become an Oracle GoldenGate 10 Certified Implementation Specialist. The following Boot Camp has been scheduled so that you can gain the required knowledge not only to develop and implement solutions that will drive your customers’ organizations to make better decisions, take informed actions, and run more-efficient business processes but also for you to pass the associated exam and get yourself specialized: Boot Camp Dates Location OPN Only Oracle GoldenGate 10 Implementation Boot Camp 26-28 Mar Dubai Oracle University OPN Only Boot Camps are co-funded by Oracle Alliances and Channels so are offered to you at very attractive prices. For prices, more information and assistance with registering please contact: Ion Georgescu eMail:  [email protected] Telephone:  +40 21.367.93.72

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  • Trying to re-install ubuntu 11.10on an HP Pavillion G6, screen goes black after the ubuntu logo shows.How do I get it to install normally?

    - by Josh Towers
    Installed Ubuntu 11.1 successfully without my wireless device being recognized. Used sudo apt-get update + upgrade commands to attempt to fix this. Computer crashes after upgrade and now it won't finish re-installing Ubuntu, after it shows the first purple screen with the Ubuntu logo, the screen goes black. Used the Derik's Boot Nuke CD and then attempted re-installment again, and the black screen problem remains consistent, seemingly no matter what I do. It sounds like it's installing but won't let me see anything or go anywhere. heelllppp

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  • Rotate object Up/Down/Left/Right in any orientation

    - by George Duckett
    I'm rendering model at the origin with a fixed camera looking at it positioned on the z axis. I want to be able to rotate the model up/down and left/right. Currently I have 2 variables, HorizontalRotation and VerticalRotation. When calculating the world matrix I rotate about the Y axis by HorizontalRotation and about the X axis by VerticalRotation. The ..Rotation variables are controlled by pressing up/down/left/right arrow keys. The problem I'm having is that the rotations are happening relative to the object. Lets say it's a model of the world. Pressing Up a bit would let me look at the north pole. Currently when i press right the earth spins infront of the camera on its axis; I'm still looking at the north pole. How can i get it so that no matter what rotations are currently applied i can always rotate my model relative to the camera/world axis?

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  • Is there other ways to do insert/update/delete on a remote oracle database?

    - by gunbuster363
    I asked a question recently concerning the speed of execution of insert/update/delete using JDBC driver in a remote machine, but the problem cannot be solved easily. I would like to ask, is there any other way to execute the insert/update/delete to the oracle? The current situation is this: the DB is on a seperate machine than the java program used to update the DB. I looked up the internet and found people suggesting using pure sql or pl/sql to do the update, is that possible? And do we need to operate the sql or pl/sql in a local machine? Because I have no knowledge about pl/sql, so I am not sure if we can create some kind of script and call it on a remote machine. Let say the situation is like this: the input data is on machine A, and the original java program are also on machine A, but the oracle is on machine B. is there any other approach other than JDBC?

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  • Network printer gets disabled occasionally

    - by Yossi Farjoun
    I'm running Ubuntu 10.04 and have a HP-Laserjet-3005P network printer. Occasionally (perhaps related to rebooting) the printer, which is setup as the default printer, becomes disabled. After realizing that I'm not getting anything printed, I must then open printing preferences and click on "enabled". Then it prints happily until the next time that it becomes disabled... Any ideas why this is happening and/or how I could fix it? I know I'm giving very little information, I can't think of anything else to give...if there's something I should be providing, please let me know.

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  • SQL Saturday #310 - Dublin, Ireland

    SQL Saturday is coming to Dublin on September 20, 2014. Come for a free day of SQL Server training and networking. This year's conference features a mix of levels, topics, and speakers like Buck Woody (Big Data), Jen Stirrup (PowerBI), Denny Cherry (Storage), Red Gate's Tom Austin (Continuous integration), and more. Register while space is available. Need to compare and sync database schemas?Let SQL Compare do the hard work. ”With the productivity I'll get out of this tool, it's like buying time.” Robert Sondles. Download a free trial.

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  • Help Improve Oracle Products Usability at OOW

    - by Shay Shmeltzer
    We already wrote about all the great ADF related activities at OOW. But we wanted to also let you know about an additional activity you can participate in at OpenWorld: The Oracle Middleware User Experience team will be conducting focus groups and customer feedback activities at Oracle OpenWorld 2012 (Oct. 1st - Oct. 3rd). Customer participation helps Oracle develop outstanding products and solutions. Professionals of all types are invited to participate: Directors, Project & Product Managers, Finance, Sales, Human Resources, Marketing, Recruiters, Budget Managers,  and more. **To participate in these sessions you do not have to be registered for Oracle OpenWorld.** If you or someone you know is interested in participating, please email [email protected] with the following information: Name: Company Name:  Job Title: Email: Phone Number (work, mobile, include country code):

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  • Viewport.Unproject - Checking if a model intersects a large sprite

    - by Fibericon
    Let's say I have a sprite, drawn like this: spriteBatch.Draw(levelCannons[i].texture, levelCannons[i].position, null, alpha, levelCannons[i].rotation, Vector2.Zero, scale, SpriteEffects.None, 0); Picture levelCannon as being a laser beam that goes across the entire screen. I need to see if my 3d model intersects with the screen space inhabited by the sprite. I managed to dig up Viewport.Unproject, but that seems to only be useful when dealing with a single point in 2d space, rather than an area. What can I do in my case?

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  • How to conduct A/B split testing with AdSense?

    - by None
    Ok so I have decided to A/B test my AdSense ads. I have run a few tests, but I don't know what conclusion to draw and how to keep track of things. Some specific questions: If I have 2 test units, 1 wins. I test that with a new and so on. How do I find if say the fifth one did better than the first one? How do I keep track of things? Do I let the variables independent of each other, because they certainly are not. In real life, font size can affect CTR even if the colors are different. I can test blue color with red color, and then test Arial font with Georgia, but how do I know which combination is the best? This would result in way too many test units. I tried Googling a lot, but I could not find answers to these questions.

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  • java or .net or xml, SOAP need carrer guidance

    - by s.nigam
    0 down vote favorite Share on Facebook Share on Twitter First of all let me thank you all for reading & devoting time for my question. I am developer with around 3.7 years of experience in .net. I recently discussed & visited some of the websites which states that java is better then .net, a I also discussed with some of the experience persons all suggested me to switch to java of course spring, struts etc. As Java developer is being paid high then .net one. I personally think I should go for web services SOAP, XML etc. thanks to all for response I also want to know if I can only move to webservices ex. WCF, SOAP, XML, XSLT etc. Kindly help me I am bit confused. Thanks

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  • Will the MacBook Pro Early 2011 work better with Ubuntu than the Air Late 2010?

    - by AllanCaeg
    I got this late 2010 11" MacBook Air. I'm having issues with NVIDIA graphics, especially with GNOME Shell. I'm thinking about selling this to switch to the new MacBook Pro, particularly the entry level 13" (see specs here), because of the Intel HD Graphics 3000. I assume that it will be more FOSS-friendly. I just want to point out that there are non-negotiable reasons why I'm keeping an Apple hardware at the moment, so let's keep this on topic. Will the MacBook Pro Early 2011 work better with Ubuntu than the Air Late 2010? Any other factors than the graphics hardware? Should we expect better NVIDIA graphics anytime soon?

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  • How to Use Google Chrome as Your Default PDF Reader (the Easy Way)

    - by The Geek
    If you’re anything like 99% of everybody, you have some sort of PDF viewing software installed on your PC—but did you realize that you can use Google Chrome to view PDFs from your PC? It’s easy! We’re showing off how to do this in Windows, but theoretically it would work for OS X or Linux as well. If you’ve tried it, let us know in the comments Latest Features How-To Geek ETC How to Use Google Chrome as Your Default PDF Reader (the Easy Way) How To Remove People and Objects From Photographs In Photoshop Ask How-To Geek: How Can I Monitor My Bandwidth Usage? Internet Explorer 9 RC Now Available: Here’s the Most Interesting New Stuff Here’s a Super Simple Trick to Defeating Fake Anti-Virus Malware How to Change the Default Application for Android Tasks Final Man vs. Machine Round of Jeopardy Unfolds; Watson Dominates The Legend of Zelda – 1980s High School Style [Video] Suspended Sentence is a Free Cross-Platform Point and Click Game Build a Batman-Style Hidden Bust Switch Make Your Clock Creates a Custom Clock for your Android Homescreen Download the Anime Angels Theme for Windows 7

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  • PostgreSQL, Ubuntu, NetBeans IDE (Part 2)

    - by Geertjan
    Now let's create the start of a CRUD application on the NetBeans Platform, using Hibernate and PostgreSQL to do so. Here's what I see in NetBeans IDE after setting things up as outlined yesterday: The NetBeans Platform CRUD Tutorial should get you up and started creating the NetBeans Platform application. Open the generated "persistence.xml" in Design mode and then switch the persistence library to Hibernate. The Here's the application structure: The Hibernate module that you see above has this content: Here's the result: And here's the source code: http://java.net/projects/nb-api-samples/sources/api-samples/show/versions/7.3/misc/NBPostgreSQL

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